IOS 导航栏 UINavigationController 常用

1 创建：FirstViewController、SecondViewController 2、在FirstViewController的viewDidLoad设置属性 override func viewDidLoad() { super.viewDidLoad() // Do any additional setup after loading the view. self.title = “第一页” self.view.backgroundColor = UIColor.brown self.navigationItem.rightBarButtonItem = UIBarButtonItem(title：”下一页”, style： UIBarButtonItemStyle.plain, target：self, action：

selector(FirstViewController.nextPage))

} func nextPage() { let viewController = SecondViewController() self.navigationController？.pushViewController(viewController, animated：true) } 3、AppDelegate.swift中的didFinishLaunchingWithOptions func application(_ application：UIApplication, didFinishLaunchingWithOptions launchOptions： [NSObject： AnyObject]？) -> Bool { // Override point for customization after application launch. let viewController = FirstViewController() let navigationController = UINavigationController(rootViewController：viewController) self.window？.rootViewController =navigationController return true } 4、SecondSubViewController.swift import UIKit var pageNum = 0 class SecondViewController：UIViewController { override func viewDidLoad() { super.viewDidLoad() pageNum = pageNum + 1 self.title = “第(pageNum)页” self.view.backgroundColor = UIColor.purple let push = UIButton(frame：CGRect(x：40, y：120, width：240, height：40)) push.setTitle(“Push Page”, for：UIControlState()) push.backgroundColor = UIColor.orange push.addTarget(self, action：

selector(SecondViewController.pushPage), for：

UIControlEvents.touchUpInside) self.view.addSubview(push) let pop = UIButton(frame：CGRect(x：40, y：180, width：240, height：40)) pop.setTitle(“Pop Page”, for：UIControlState()) pop.backgroundColor = UIColor.orange pop.addTarget(self, action：

selector(SecondViewController.popPage), for：

UIControlEvents.touchUpInside) self.view.addSubview(pop) let index = UIButton(frame：CGRect(x：40, y：280,width：240, height：40)) index.setTitle(“Goto Index Page”, for： UIControlState()) index.backgroundColor = UIColor.orange index.addTarget(self, action：

selector(SecondViewController.gotoIndexPage), for：

UIControlEvents.touchUpInside) self.view.addSubview(index) let root = UIButton(frame：CGRect(x：40, y：340, width：240, height：40)) root.setTitle(“Goto Root Page”, for：UIControlState()) root.backgroundColor = UIColor.orange root.addTarget(self, action：

selector(SecondViewController.gotoRootPage), for：

UIControlEvents.touchUpInside) self.view.addSubview(root) } } func pushPage() { let viewController = SecondViewController() self.navigationController？.pushViewController(viewController,animated：true) } func popPage() { self.navigationController？.popViewController(animated：true) } func gotoIndexPage() { let viewController = self.navigationController？.viewControllers[2] self.navigationController？.popToViewController(viewController！, animated：true) } func gotoRootPage() { self.navigationController？.popToRootViewControllerAnimated(animated：true) }

6、更改导航栏的可见性/导航栏样式修改：FirstSubViewController.swift中的viewWillAppear override func viewWillAppear(animated：Bool) { super.viewWillAppear(animated) self.navigationController？.setToolbarHidden(false,animated：false) self.navigationController？.setNavigationBarHidden(true,animated：true) self.navigationItem.prompt = “正在载入……” self.navigationItem.leftBarButtonItem = UIBarButtonItem(barButtonSystemItem：.refresh, target： self, action：#selector(FirstSubViewController.refresh)) self.navigationController？.navigationBar.isTranslucent= false self.navigationController？.navigationBar.barStyle =UIBarStyle.black self.navigationController？.navigationBar.tintColor =UIColor.orange } func refresh() { print(“刷新数据。”) }

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